(English Medium) ICSE Class 10 - CISCE Important Questions for Chemistry

Identify the substance underlined, in the following case:

Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide.

State one relevant observation for given reactions:

Action of Sodium hydroxide solution on ferrous sulfate solution.

How will you distinguish between Ammonium hydroxide and Sodium hydroxide using copper sulphate solution?

Identify the salts P and Q from the observations given below:

On performing the flame test salt P produces a lilac coloured flame and its solution gives a white precipitate with silver nitrate solution, which is soluble in Ammonium hydroxide solution.

_____________ (AgCl / PbCl₂), a white precipitate is soluble in excess NH₄OH

Match the salts given in Column I with their method of preparation given in Column II.

State your observations when ammonium hydroxide solution is added drop by drop and then in excess to each of the following solutions :
1) Copper sulphate solution

2) Zinc sulfate solution.

Identify the cations in the following case:

NaOH solution, when added to the Solution (A), gives a reddish brown precipitate

Choose the most appropriate answer from the following list of oxides which fit the description.

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

A basic oxide.

Choose the most appropriate answer from the following list of oxides which fit the description

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

An oxide which dissolves in water forming an acid

Choose the most appropriate answer from the following list of oxides which fit the description

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

An amphoteric oxide

State your observation When excess sodium hydroxide is added to calcium nitrate solution

Name the kind of particles present in sodium hydroxide solution.

State one relevant observation for the following.

Lead nitrate solution is treated with sodium hydroxide solution dropwise till it is excess.

A compound X (having the vinegar-like smell) when treated with ethanol in the presence of the acid Z, gives a compound Y which has a fruity smell.

The reaction is:

1) Identify Y and Z.

2) Write the structural formula of X.

3) Name the above reaction.

Give a chemical test to distinguish between the given pairs of chemicals:

Lead nitrate solution and Zinc nitrate solution

The hydroxide soluble in excess of ammonium hydroxide is ______.

______ is a white precipitate that is soluble in excess of Ammonium hydroxide solution.

Identify the cation in the following case:

Ammonium hydroxide solution when added to Solution B gives a white precipitate which does not dissolve in excess of ammonium hydroxide solution.

Identify the cation in the following case:

Sodium hydroxide solution when added to Solution C gives a white precipitate which is insoluble in excess of sodium hydroxide solution.